97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
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/* Copyright (C) 2005 David Decotigny
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA.
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*/
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#ifndef _SOS_UACCESS_H_
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#define _SOS_UACCESS_H_
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/**
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* @file uaccess.h
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*
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* Routines to access user-space data from inside the kernel space.
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*/
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#include <sos/types.h>
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#include <sos/errno.h>
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/**
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* Retrieve a bunch of data from the user space of the
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* current_thread->process
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*
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* @return <0 on error ! Return the number of bytes successfully copied
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* otherwise.
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*/
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sos_ret_t sos_memcpy_from_user(sos_vaddr_t kernel_to,
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sos_uaddr_t user_from,
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sos_size_t size);
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/**
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* Transfer a bunch of data to the user space of the
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* current_thread->process
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*
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* @return <0 n error ! Return the number of bytes successfully copied
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* otherwise.
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*/
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sos_ret_t sos_memcpy_to_user(sos_uaddr_t user_to,
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sos_vaddr_t kernel_from,
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sos_size_t size);
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/**
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* @return the length of the given user space string user_str
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* (excluding the trailing \0), up to max_len bytes. <0 on error
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* (unresolved page fault, etc.)
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*/
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sos_ret_t sos_strnlen_from_user(sos_uaddr_t user_str, sos_size_t max_len);
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/**
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* Copy the given user space string to kernel space, up to max_len
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* bytes (including trailing \0)
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*
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* @return SOS_OK on success, <0 otherwise (unresolved page fault, etc.)
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*/
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sos_ret_t sos_strzcpy_from_user(char *kernel_to, sos_uaddr_t user_from,
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sos_size_t max_len);
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/**
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* Copy the given kernel string to user space, up to max_len bytes
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* (including trailing \0)
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*
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* @return SOS_OK on success, <0 otherwise (unresolved page fault, etc.)
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*/
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sos_ret_t sos_strzcpy_to_user(sos_uaddr_t user_to, const char *kernel_from,
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sos_size_t max_len);
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/**
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* Copy the given user space string into a new allocated kernel space
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* area of the correct size, up to max_len bytes (including trailing
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* \0)
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*
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* @return SOS_OK on success + *kernel_to is set to the freshly
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* allocated kernel string, <0 otherwise (unresolved page fault, etc.)
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*/
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sos_ret_t sos_strndup_from_user(char ** kernel_to, sos_uaddr_t from_user,
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sos_size_t max_len,
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sos_ui32_t kmalloc_flags);
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#endif /* _SOS_UACCESS_H_ */
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